The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 2021
Filed:
Apr. 07, 2017
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Radoslaw Kierat, Ludwigshafen am Rhein, DE;
Michael Klemens Mueller, Ludwigshafen am Rhein, DE;
Andreas Kempter, Ludwigshafen am Rhein, DE;
Oscar Lafuente Cerda, Trostberg, DE;
Kai Bergner, Ludwigshafen am Rhein, DE;
Assignee:
BASF SE, Ludwigshafen am Rhein, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 7/00 (2006.01); B32B 5/16 (2006.01); C04B 20/10 (2006.01); C04B 28/02 (2006.01); C04B 40/06 (2006.01); C04B 22/06 (2006.01); C04B 111/00 (2006.01); C04B 111/34 (2006.01); C04B 111/60 (2006.01); C04B 111/70 (2006.01); C04B 111/72 (2006.01); C04B 111/62 (2006.01); C04B 111/28 (2006.01);
U.S. Cl.
CPC ...
C04B 20/1085 (2013.01); C04B 20/1074 (2013.01); C04B 22/064 (2013.01); C04B 22/066 (2013.01); C04B 28/02 (2013.01); C04B 40/0641 (2013.01); C04B 2111/00146 (2013.01); C04B 2111/00482 (2013.01); C04B 2111/00637 (2013.01); C04B 2111/28 (2013.01); C04B 2111/34 (2013.01); C04B 2111/60 (2013.01); C04B 2111/62 (2013.01); C04B 2111/70 (2013.01); C04B 2111/72 (2013.01);
Abstract
The invention relates to a process for preparing silica-coated particles of an inorganic expanding agent, the silica-coated particles and their use. The silica-coated particles show a delayed release of the expanding agent particularly in alkaline medium and at elevated temperatures. They are therefore useful in the oil and construction industry.